You state "let real estate developers build housing. Full Stop." Using your car example, if we allowed auto-makers to do anything they wanted, FULL STOP, well.

You state "let real estate developers build housing. Full Stop." Using your car example, if we allowed auto-makers to do anything they wanted, FULL STOP, well...fuel standards would be much lower and we'd have even more work to do on carbon emissions. Furthermore, when you look at most of the massive cars built today, the majority of trips will have on average maybe 1.2-1.5 people in it. Most people choose their cars selfishly, with little regard for local emissions, asthma, emphysema, or the broader climate. Should automakers be making these huge cars, unregulated and unfettered? Wouldn't it be better for the untold billions of people not yet living, if we put into place guidelines and rules to limit the inefficiency of laissez-faire vehicle production? Now, let's think of housing. Does it make sense in San Fran to build more single-family homes, when the footprint of where houses can be built is so limited? Or, does it make sense to have 3-5 family units, allowing less-rich or less fortunate individuals to still buy in to the market? Will the developers that you're "just letting" do whatever they want build these more useful domiciles? Or will they build luxury homes for the rich with higher profits based on higher prices? I think individuals owning pieces of the city is a luxury. It makes more sense to me to have 3-5 family units, or small condo or townhouse buildings. Will those be built by the laissez-faire free market? The outlook is not good.